I'm not sure I have the best answer on this one. If you are looking for high quality, then you would typically use a professional grade HDMI or SDI transmitter/receiver system. This is what broadcast professionals use with battery operated cameras.
Anything short of that will be a hit in terms of quality.
This is where I would be looking:
You likely will need to convert from HDMI to SDI for this type of product.
Also, be aware that 10x9 isn't the aspect ratio of any camera that I'm aware of. If shooting in high definition (typical) then you will be shooting 16:9. So, 120" wide by about 68" tall for your image.